Hi everyone
What about this: If we define an enumeration like the following:
public enum MbUnitSpecialValue
{
Null
}
And then we modify the RowTestAttribute's GetRow method to change
every occurrence of MbUnitSpecialValue.Null for null, then we could
write Judah's test like this:
[RowTest]
[Row(MbUnitSpecialValue.Null, bar, baz, ExpectedException
=typeof(ArgumentNullException)]
[Row(foo, MbUnitSpecialValue.Null, baz, ExpectedException
=typeof(ArgumentNullException)]
[Row(foo, bar, MbUnitSpecialValue.Null, ExpectedException
=typeof(ArgumentNullException))]
public void FobnicateValidatesInput(Foo foo, Bar bar, Baz baz)
{
dar.Fobnicate(foo, bar, baz);
}
That would be a fast change, but it doesn't solve the more general
problem that we face for using attributes to the define the rows:
- We can't use anything but primitive types
- VB 2003 compiler can't handle the Row attribute
- With C# 2003 we can't use null in the attribute (it works on C# 2005
at least).
Using a "row provider" is the best choice IMHO. In this blopg post
http://www.hpoffice.cl/julian/archive/2007/04/17/mbunit-rowtest-in-vb-2003.aspx
I proposed something similar to Jay's first example (using arrays
instead of generics so it works for Fx1.1 too):
[RowProvider]
public IEnumerable RowsForLengthTest()
{
object[] row1 = { "M", 1 };
object[] row1 = { "Mb", 2, GetType(ArgumentNullException) };
object[][] rowArray = { row1, row2 };
return rowArray;
}
[RowTest(), Provider("RowsForLengthTest")]
public void LenghtTest(string someString, int length)
{
Assert.AreEqual(someString.Length, length);
}
I'm not that worried about the key part, because these are tests so a
developer (or anyone) should find very quickliy if she got's a key
wrong. Besides, we are already using keys for combinatorial tests for
example.
To be honest I found the last example (using [NonNullArgument]) a
little confusing and harder to read that the first solution.
Regards
Julián
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